Torture? Never! Except...
Torture is an impermissible evil. Except under two circumstances. The first is the ticking time bomb. An innocent's life is at stake. The bad guy you have captured possesses information that could save this life. He refuses to divulge. In such a case, the choice is easy. Even John McCain, the most admirable and estimable torture opponent, says openly that in such circumstances, "You do what you have to do." And then take the responsibility.
Some people, however, believe you never torture. Ever. They are akin to conscientious objectors who will never fight in any war under any circumstances, and for whom we correctly show respect by exempting them from war duty. But we would never make one of them Centcom commander. Private principles are fine, but you don't entrust such a person with the military decisions upon which hinges the safety of the nation. It is similarly imprudent to have a person who would abjure torture in all circumstances making national security decisions upon which depends the protection of 300 million countrymen.
Read it all, especially the end when he comes to the "contemptible" behavior of Nancy Pelosi and others.